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1.
BMC Plant Biol ; 19(1): 569, 2019 Dec 19.
Artigo em Inglês | MEDLINE | ID: mdl-31856712

RESUMO

BACKGROUND: Seed germination is essential to crop growth and development, and ultimately affects its harvest. It is difficult to breed soybeans low in phytic acid with a higher seed field emergence. Although additional management and selection could overcome the phytate reduction, the mechanisms of seed germination remain unknown. RESULTS: A comparative proteomic analysis was conducted between two low phytic acid (LPA) soybean mutants (TW-1-M and TW-1), both of which had a deletion of 2 bp in the GmMIPS1 gene. However, the TW-1 seeds showed a significantly lower field emergence compared to the TW-1-M. There were 282 differentially accumulated proteins (DAPs) identified between two mutants at the three stages. Among these DAPs, 80 were down-accumulated and 202 were up-accumulated. Bioinformatic analysis showed that the identified proteins were related to functional categories of oxidation reduction, response to stimulus and stress, dormancy and germination processes and catalytic activity. KEGG analysis showed that these DAPs were mainly involved in energy metabolism and anti-stress pathways. Based upon the conjoint analysis of DAPs with the differentially expressed genes (DEGs) previously published among three germination stages in two LPA mutants, 30 shared DAPs/DEGs were identified with different patterns, including plant seed protein, beta-amylase, protein disulfide-isomerase, disease resistance protein, pyrophosphate-fructose 6-phosphate 1-phosphotransferase, cysteine proteinase inhibitor, non-specific lipid-transfer protein, phosphoenolpyruvate carboxylase and acyl-coenzyme A oxidase. CONCLUSIONS: Seed germination is a very complex process in LPA soybean mutants. The TW-1-M and TW-1 showed many DAPs involved in seed germination. The differential accumulation of these proteins could result in the difference of seed field emergence between the two mutants. The high germination rate in the TW-1-M might be strongly attributed to reactive oxygen species-related and plant hormone-related genes. All these findings would help us further explore the germination mechanisms in LPA crops.

2.
PLoS One ; 11(3): e0150504, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26930632

RESUMO

BACKGROUND: Suaeda glauca, a succulent halophyte of the Chenopodiaceae family, is widely distributed in coastal areas of China. Suaeda glauca is highly resistant to salt and alkali stresses. In the present study, the salt-responsive transcriptome of Suaeda glauca was analyzed to identify genes involved in salt tolerance and study halophilic mechanisms in this halophyte. RESULTS: Illumina HiSeq 2500 was used to sequence cDNA libraries from salt-treated and control samples with three replicates each treatment. De novo assembly of the six transcriptomes identified 75,445 unigenes. A total of 23,901 (31.68%) unigenes were annotated. Compared with transcriptomes from the three salt-treated and three salt-free samples, 231 differentially expressed genes (DEGs) were detected (including 130 up-regulated genes and 101 down-regulated genes), and 195 unigenes were functionally annotated. Based on the Gene Ontology (GO), Clusters of Orthologous Groups (COG) and Kyoto Encyclopedia of Genes and Genomes (KEGG) classifications of the DEGs, more attention should be paid to transcripts associated with signal transduction, transporters, the cell wall and growth, defense metabolism and transcription factors involved in salt tolerance. CONCLUSIONS: This report provides a genome-wide transcriptional analysis of a halophyte, Suaeda glauca, under salt stress. Further studies of the genetic basis of salt tolerance in halophytes are warranted.


Assuntos
Chenopodiaceae/genética , Perfilação da Expressão Gênica/métodos , Plantas Tolerantes a Sal/genética , Análise de Sequência de RNA/métodos , Chenopodiaceae/fisiologia , DNA de Plantas/genética , Regulação da Expressão Gênica de Plantas/genética , Regulação da Expressão Gênica de Plantas/fisiologia , Biblioteca Gênica , Reação em Cadeia da Polimerase em Tempo Real , Plantas Tolerantes a Sal/fisiologia
3.
PLoS Genet ; 10(1): e1004061, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24391523

RESUMO

Phosphorus (P) is essential for all living cells and organisms, and low-P stress is a major factor constraining plant growth and yield worldwide. In plants, P efficiency is a complex quantitative trait involving multiple genes, and the mechanisms underlying P efficiency are largely unknown. Combining linkage analysis, genome-wide and candidate-gene association analyses, and plant transformation, we identified a soybean gene related to P efficiency, determined its favorable haplotypes and developed valuable functional markers. First, six major genomic regions associated with P efficiency were detected by performing genome-wide associations (GWAs) in various environments. A highly significant region located on chromosome 8, qPE8, was identified by both GWAs and linkage mapping and explained 41% of the phenotypic variation. Then, a regional mapping study was performed with 40 surrounding markers in 192 diverse soybean accessions. A strongly associated haplotype (P = 10(-7)) consisting of the markers Sat_233 and BARC-039899-07603 was identified, and qPE8 was located in a region of approximately 250 kb, which contained a candidate gene GmACP1 that encoded an acid phosphatase. GmACP1 overexpression in soybean hairy roots increased P efficiency by 11-20% relative to the control. A candidate-gene association analysis indicated that six natural GmACP1 polymorphisms explained 33% of the phenotypic variation. The favorable alleles and haplotypes of GmACP1 associated with increased transcript expression correlated with higher enzyme activity. The discovery of the optimal haplotype of GmACP1 will now enable the accurate selection of soybeans with higher P efficiencies and improve our understanding of the molecular mechanisms underlying P efficiency in plants.


Assuntos
Fosfatase Ácida/genética , Fósforo/metabolismo , Soja/genética , Estresse Fisiológico/genética , Fosfatase Ácida/fisiologia , Mapeamento Cromossômico , Cromossomos de Plantas , Regulação da Expressão Gênica de Plantas , Estudo de Associação Genômica Ampla , Haplótipos , Dados de Sequência Molecular , Fenótipo , Locos de Características Quantitativas/genética , Soja/crescimento & desenvolvimento
4.
ScientificWorldJournal ; 2013: 768972, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23983646

RESUMO

GmNAC5 is a member of NAM subfamily belonging to NAC transcription factors in soybean (Glycine max (L.) Merr.). Studies on NAC transcription factors have shown that this family functioned in the regulation of shoot apical meristem (SAM), hormone signalling, and stress responses. In this study, we examined the expression levels of GmNAC5. GmNAC5 was highly expressed in the roots and immature seeds, especially strongly in immature seeds of 40 days after flowering. In addition, we found that GmNAC5 was induced by mechanical wounding, high salinity, and cold treatments but was not induced by abscisic acid (ABA). The subcellular localization assay suggested that GmNAC5 was targeted at nucleus. Together, it was suggested that GmNAC5 might be involved in seed development and abiotic stress responses in soybean.


Assuntos
Proteínas de Plantas/fisiologia , Soja/fisiologia , Estresse Fisiológico , Fatores de Transcrição/fisiologia , Temperatura Baixa , Reação em Cadeia da Polimerase em Tempo Real , Cloreto de Sódio , Soja/genética , Frações Subcelulares/metabolismo
5.
Neurochem Int ; 60(8): 759-67, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22490611

RESUMO

Recently, the treatment of stroke has focused on antioxidant therapies, where oxidative stress is implicated. The preventive and therapeutic potential of plant compounds on ischemic stroke has been intensively studied because many of them contain antioxidant properties. Genistein, one of the active ingredients in soybean, possesses many bioactivities. In this study, we investigated the potential neuroprotective effects of genistein and its possible mechanism of action in a cerebral ischemia mouse model. Mice were pretreated with genistein (2.5, 5, and 10mg/kg) or vehicle orally once daily for 14 consecutive days before transient middle cerebral artery occlusion was performed. Genistein at doses of 2.5-10mg/kg significantly reduced the infarct volume, improved the neurological deficit and prevented cell apoptosis after ischemia. In addition, genistein pretreatment was shown to inhibit the ischemia-induced reactive oxygen species (ROS) production, enhance the activities of antioxidant enzymes superoxide dismutase (SOD) and glutathione peroxidase (GPx), and decrease levels of malondialdehyde (MDA) in stroke mice. Moreover, genistein reversed the mitochondria dysfunction after ischemia, as evidenced by decreasing mitochondria ROS levels, preventing cytochrome C release to the cytoplasm and inhibiting caspase-3 activation. Western blotting showed ischemia activated the ROS-dependent nuclear factor-κB (NF-κB) signaling pathway, and genistein suppressed phosphorylation and activation of the NF-κB p65 subunit, as well as the phosphorylation and degradation of the inhibitor protein of κBα (IκBα). Our findings suggested that genistein has a neuroprotective effect in transient focal ischemia, which may involve regulation of mitochondria-dependent apoptosis pathways and suppression of ROS-induced NF-κB activation.


Assuntos
Apoptose/efeitos dos fármacos , Isquemia Encefálica/metabolismo , Modelos Animais de Doenças , Genisteína/farmacologia , Mitocôndrias/efeitos dos fármacos , NF-kappa B/metabolismo , Fármacos Neuroprotetores/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Animais , Western Blotting , Isquemia Encefálica/enzimologia , Isquemia Encefálica/patologia , Caspase 3/metabolismo , Citocromos c/metabolismo , Ativação Enzimática , Glutationa Peroxidase/metabolismo , Marcação In Situ das Extremidades Cortadas , Peroxidação de Lipídeos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Mitocôndrias/fisiologia , Superóxido Dismutase
6.
Yi Chuan ; 33(5): 431-6, 2011 May.
Artigo em Chinês | MEDLINE | ID: mdl-21586389

RESUMO

Soybean is an important source of edible oil, protein and protein diet. The breeding process of high quality soybean can be accelerated via employment of transgenic technology, by which the key genes for soybean quality traits could be directly manipulated. Thus, various soybean varieties could be bred to fulfill different needs for specific consumers. Here, we reviewed the contribution of transgenic technology to improvement of soybean qualities in recent years. We also introduce some newly developed safe transgenic technologies and hope this information could relieve some concerns on the GM food.


Assuntos
Técnicas de Transferência de Genes , Plantas Geneticamente Modificadas/genética , Soja/genética , Óleo de Soja/análise , Proteínas de Soja/análise , Soja/química
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